Sampler: Fix dispose.

[Mugen87]

Related issue: #31747 (comment)

Description

Fixes the dispose logic in the Sampler binding class.

[Mugen87]

_onDisposeTexture() is cloned like all other properties. Because EventListener does not let you assign the same listener more than once, only the first dispose works. It has to be inlined in the setter of texture to make it work.

[Mugen87]

An explicit call of the texture setter is required so cloned instances have proper dispose event listeners.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	338.91 79.11	338.91 79.11	+0 B +0 B
WebGPU	578.16 159.25	578.22 159.27	+65 B +18 B
WebGPU Nodes	576.76 159.01	576.83 159.03	+65 B +18 B

🌳 Bundle size after tree-shaking

Minimal build including a renderer, camera, empty scene, and dependencies.

	Before	After	Diff
WebGL	470.78 113.9	470.78 113.9	+0 B +0 B
WebGPU	648.69 175.28	648.76 175.3	+65 B +18 B
WebGPU Nodes	602.79 164.41	602.85 164.42	+65 B +19 B

[Mugen87]

For r181, I think it's better to get rid of Object.assign() in Binding.clone(). Instead, we should implement the clone like for Object3D and then provide copy methods in all binding classes to control which properties should be copied. In this way, the code is more predictable.